Service Manual

Workman HD SeriesPage 9 − 58Hydraulic System
Steering Cylinder Service
1. Rear shaft
2. Wear ring
3. Seal
4. O−ring
5. Piston
6. Rear head
7. O−ring
8. Back−up ring
9. Retaining ring
10. Seal
11. Dust seal
12. Barrel
13. Front shaft
14. Roll pin
15. Front head
Figure 45
12
71582
1411
910
5
4
31 133
468 9
11
Disassembly (Fig. 45)
1. Pump oil out of cylinder into a drain pan by slowly
moving piston back and forth.
2. Before disassembling cylinder, plug ports, wash ex-
terior with cleaning solvent and dry thoroughly.
IMPORTANT: Prevent damage when clamping the
cylinder’s barrel into a vise; clamp on the clevis
only. Do not close vise on barrel.
3. Mount steering cylinder in a vise equipped with soft
jaws by clamping on the barrel clevis.
4. Remove retaining rings that secure both heads in
barrel.
A. Use a spanner wrench to rotate head clockwise
until the edge of the retaining ring appears in the bar-
rel opening.
B. Insert a screwdriver under the beveled edge of
the retaining ring to start the retaining ring through
the opening.
C. Rotate the head counter−clockwise to remove re-
taining ring from barrel and head.
5. Use a twisting and pulling motion to carefully extract
the front head assembly from the barrel.
6. Grasp end of rear shaft and use a twisting and pulling
motion to carefully extract the rear shaft, rear head, front
shaft and piston assembly from the barrel.
7. Remove cylinder from vise.
IMPORTANT: When removing roll pin from front and
rear shafts, make sure that shaft surfaces are not
damaged.
8. Remove roll pin that secures front shaft to rear shaft,
then remove front shaft, piston and rear head from rear
shaft. Retain the ⅛” x ⅞” roll pin for reassembly.
9. Remove and discard seals, O−rings and wear ring
from piston and heads.